| Orthacodontidae Temporal range: | |
|---|---|
 | |
| Head of Archaeogracilidens macer | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Family: | † Orthacodontidae Glikman, 1957 |
| Genera | |
| |
Orthacodontidae (also spelled Orthacodidae [1] ) is an extinct family of sharks. It is disputed as to whether it belongs to the modern shark order Hexanchiformes, [2] or the extinct order Synechodontiformes. [3] It contains three genera. Some other authors included it in Lamniformes. [4] More recent studies have generally favored its placement in the Hexanchiformes. [1]
